148918009 has 2 divisors, whose sum is σ = 148918010. Its totient is φ = 148918008.

The previous prime is 148918001. The next prime is 148918037. The reversal of 148918009 is 900819841.

148918009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134629609 + 14288400 = 11603^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 148918009 - 2³ = 148918001 is a prime.

It is not a weakly prime, because it can be changed into another prime (148918001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74459004 + 74459005.

It is an arithmetic number, because the mean of its divisors is an integer number (74459005).

Almost surely, 2^148918009 is an apocalyptic number.

It is an amenable number.

148918009 is a deficient number, since it is larger than the sum of its proper divisors (1).

148918009 is an equidigital number, since it uses as much as digits as its factorization.

148918009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 148918009 is about 12203.1966713644. The cubic root of 148918009 is about 530.0486593511.

The spelling of 148918009 in words is "one hundred forty-eight million, nine hundred eighteen thousand, nine".